Doctors work to boost understanding from those participating in studies related to Down syndrome, Fragile X syndrome

Doctors, researchers and drug companies are coming up with simple designs to address a complex ethical dilemma: how to make sure people with intellectual disabilities consent to join a drug trial.

With growing numbers of clinical trials getting under way involving conditions such as Down syndrome and Fragile X syndrome, researchers are trying new strategies to ensure people with the conditions, which typically involve intellectual...